How Amedeo Scognamiglio carved out a niche in a centuries-old tradeAmedeo Scognamiglio’s story doesn’t follow a tidy narrative of beginning, middle, and end. He’s Italian, yes, and a jewelry designer, and he’s based in New York City. But scratch beneath that introductory surface and his tale splits into myriad directions. ­Scognamiglio is cofounder of fine jewelry firm Faraone Mennella; he has his own cameo company, Amedeo; and he’s an HSN personality to boot. Mind you, he’s been doing all three, more or less, at the same time. If this were a film, you’d need split screens to properly tell the tale. So where to begin?Hand-carved black lava king monkey with diamonds in black rhodium-plated pendant; $3,500; Amedeo, NYC; 212-737-4100; amedeonyc.comSeated in his office not far from New York City’s Diamond District, Scognamiglio starts with his hometown, Torre del Greco, Ital